Basic Documentation

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Siemens Rotary actuators with spring return GCA…1 CE1Z4613en
Building Technologies Technical design 2017-05-26
3.4 Adjustable characteristic function
A modulating positioning signal DC 0..35 V from a controller drives the actuator.
The angular rotation is proportional to the positioning signal. Using potentiometer "Uo",
you can set the offset for DC 0...5 V, and with potentiometer "ΧU", you can set the span
for DC 2...30 V.
100
0
U
O
Ys [%]
4637D04
2 5 10 35
2)
1)
Χ
U (max. 30 V)
4)
30
Y [V]
3)
Ys Positioning range: 100 % = angular rotation 95°
Y Positioning signal
Uo Offset
ΧU Span (for Ys = 100 %)
Uo
2
4
0
1
3
5
ΧU
30
2
15
10
5
20
25
Uo
4 6
3 7 Z 0 1
ΧU
Example
Positioning
signal Y
Positioning
range Ys
Settings
Uo ΧU
1) DC 0...2 V 0...100 % DC 0 V DC 2 V
2)
DC 5...10 V
DC 5...35 V
0...17 %
0...100 %
DC 5 V DC 30 V
3)
DC 0...10 V
DC 0...30 V
0...33 %
0...100 %
DC 0 V DC 30 V
4)* DC 0...10 V 0...100 % DC 0 V DC 10 V
4)* Characteristic curve for factory setting
∂ The Y input is limited to max. DC 35 V
∂ The adjustable span ΧU is max. 30 V
Define the adjustable span ΧU if the actuator is to open from 0...50 % at a positioning
signal of Y = DC 2…10 V. The offset Uo thus amounts to 2 V. The angular rotation is
90°. Self-adaption is inactive.
Calculating the setting value for ΧU:
Ζ
∴
Ζ∴
Ζ∴ Ζ∴ ∋ ( ∋ ( V16 V2 V10
%50
%100
VUoV10
% YsSpan
%maxYsrangepos.max.
UΔ <,√<,√<
Uo = 2 V, ΧU = 16 V
Actuators
GCA163.1, GCA164.1
Examples as per
the diagram
Note
Example
Formula
Potentiometer settings